What can I give him to help with his cough and most likely the sore throat he caused himself from coughing?

To help alleviate cough and throat pain, you can consider giving your child cough syrup or lozenges specifically designed for children. It is also important to ensure they stay hydrated and get plenty of rest. If there are additional symptoms such as a runny or stuffy nose, a nasal decongestant may also be helpful. However, it is advisable to consult with a pharmacist or healthcare professional for personalized advice and treatment options.